parser.js

PEG.parser = (function(){
  /* Generated by PEG.js 0.6.2 (http://pegjs.majda.cz/). */
  
  var result = {
    /*
     * Parses the input with a generated parser. If the parsing is successfull,
     * returns a value explicitly or implicitly specified by the grammar from
     * which the parser was generated (see |PEG.buildParser|). If the parsing is
     * unsuccessful, throws |PEG.parser.SyntaxError| describing the error.
     */
    parse: function(input, startRule) {
      var parseFunctions = {
        "__": parse___,
        "action": parse_action,
        "and": parse_and,
        "braced": parse_braced,
        "bracketDelimitedCharacter": parse_bracketDelimitedCharacter,
        "choice": parse_choice,
        "class": parse_class,
        "classCharacter": parse_classCharacter,
        "classCharacterRange": parse_classCharacterRange,
        "colon": parse_colon,
        "comment": parse_comment,
        "digit": parse_digit,
        "dot": parse_dot,
        "doubleQuotedCharacter": parse_doubleQuotedCharacter,
        "doubleQuotedString": parse_doubleQuotedString,
        "eol": parse_eol,
        "eolChar": parse_eolChar,
        "eolEscapeSequence": parse_eolEscapeSequence,
        "equals": parse_equals,
        "grammar": parse_grammar,
        "hexDigit": parse_hexDigit,
        "hexEscapeSequence": parse_hexEscapeSequence,
        "identifier": parse_identifier,
        "initializer": parse_initializer,
        "labeled": parse_labeled,
        "letter": parse_letter,
        "literal": parse_literal,
        "lowerCaseLetter": parse_lowerCaseLetter,
        "lparen": parse_lparen,
        "multiLineComment": parse_multiLineComment,
        "nonBraceCharacter": parse_nonBraceCharacter,
        "nonBraceCharacters": parse_nonBraceCharacters,
        "not": parse_not,
        "plus": parse_plus,
        "prefixed": parse_prefixed,
        "primary": parse_primary,
        "question": parse_question,
        "rparen": parse_rparen,
        "rule": parse_rule,
        "semicolon": parse_semicolon,
        "sequence": parse_sequence,
        "simpleBracketDelimitedCharacter": parse_simpleBracketDelimitedCharacter,
        "simpleDoubleQuotedCharacter": parse_simpleDoubleQuotedCharacter,
        "simpleEscapeSequence": parse_simpleEscapeSequence,
        "simpleSingleQuotedCharacter": parse_simpleSingleQuotedCharacter,
        "singleLineComment": parse_singleLineComment,
        "singleQuotedCharacter": parse_singleQuotedCharacter,
        "singleQuotedString": parse_singleQuotedString,
        "slash": parse_slash,
        "star": parse_star,
        "string": parse_string,
        "suffixed": parse_suffixed,
        "unicodeEscapeSequence": parse_unicodeEscapeSequence,
        "upperCaseLetter": parse_upperCaseLetter,
        "whitespace": parse_whitespace,
        "zeroEscapeSequence": parse_zeroEscapeSequence
      };
      
      if (startRule !== undefined) {
        if (parseFunctions[startRule] === undefined) {
          throw new Error("Invalid rule name: " + quote(startRule) + ".");
        }
      } else {
        startRule = "grammar";
      }
      
      var pos = 0;
      var reportFailures = 0;
      var rightmostFailuresPos = 0;
      var rightmostFailuresExpected = [];
      var cache = {};
      
      function padLeft(input, padding, length) {
        var result = input;
        
        var padLength = length - input.length;
        for (var i = 0; i < padLength; i++) {
          result = padding + result;
        }
        
        return result;
      }
      
      function escape(ch) {
        var charCode = ch.charCodeAt(0);
        var escapeChar;
        var length;
        
        if (charCode <= 0xFF) {
          escapeChar = 'x';
          length = 2;
        } else {
          escapeChar = 'u';
          length = 4;
        }
        
        return '\\' + escapeChar + padLeft(charCode.toString(16).toUpperCase(), '0', length);
      }
      
      function quote(s) {
        /*
         * ECMA-262, 5th ed., 7.8.4: All characters may appear literally in a
         * string literal except for the closing quote character, backslash,
         * carriage return, line separator, paragraph separator, and line feed.
         * Any character may appear in the form of an escape sequence.
         *
         * For portability, we also escape escape all control and non-ASCII
         * characters. Note that "\0" and "\v" escape sequences are not used
         * because JSHint does not like the first and IE the second.
         */
        return '"' + s
          .replace(/\\/g, '\\\\')  // backslash
          .replace(/"/g, '\\"')    // closing quote character
          .replace(/\x08/g, '\\b') // backspace
          .replace(/\t/g, '\\t')   // horizontal tab
          .replace(/\n/g, '\\n')   // line feed
          .replace(/\f/g, '\\f')   // form feed
          .replace(/\r/g, '\\r')   // carriage return
          .replace(/[\x00-\x07\x0B\x0E-\x1F\x80-\uFFFF]/g, escape)
          + '"';
      }
      
      function matchFailed(failure) {
        if (pos < rightmostFailuresPos) {
          return;
        }
        
        if (pos > rightmostFailuresPos) {
          rightmostFailuresPos = pos;
          rightmostFailuresExpected = [];
        }
        
        rightmostFailuresExpected.push(failure);
      }
      
      function parse_grammar() {
        var cacheKey = "grammar@" + pos;
        var cachedResult = cache[cacheKey];
        if (cachedResult) {
          pos = cachedResult.nextPos;
          return cachedResult.result;
        }
        
        var result0, result1, result2, result3, result4;
        var pos0, pos1, pos2;
        
        pos0 = pos;
        pos1 = pos;
        result0 = parse___();
        if (result0 !== null) {
          result1 = parse_initializer();
          result1 = result1 !== null ? result1 : "";
          if (result1 !== null) {
            result3 = parse_rule();
            if (result3 !== null) {
              result2 = [];
              while (result3 !== null) {
                result2.push(result3);
                result3 = parse_rule();
              }
            } else {
              result2 = null;
            }
            if (result2 !== null) {
              result0 = [result0, result1, result2];
            } else {
              result0 = null;
              pos = pos1;
            }
          } else {
            result0 = null;
            pos = pos1;
          }
        } else {
          result0 = null;
          pos = pos1;
        }
        if (result0 !== null) {
          result0 = (function(initializer, rules) {
              var rulesConverted = {};
              each(rules, function(rule) { rulesConverted[rule.name] = rule; });
        
              return {
                type:        "grammar",
                initializer: initializer !== "" ? initializer : null,
                rules:       rulesConverted,
                startRule:   rules[0].name
              };
            })(result0[1], result0[2]);
        }
        if (result0 === null) {
          pos = pos0;
        }
        
        cache[cacheKey] = {
          nextPos: pos,
          result:  result0
        };
        return result0;
      }
      
      function parse_initializer() {
        var cacheKey = "initializer@" + pos;
        var cachedResult = cache[cacheKey];
        if (cachedResult) {
          pos = cachedResult.nextPos;
          return cachedResult.result;
        }
        
        var result0, result1, result2;
        var pos0, pos1, pos2;
        
        pos0 = pos;
        pos1 = pos;
        result0 = parse_action();
        if (result0 !== null) {
          result1 = parse_semicolon();
          result1 = result1 !== null ? result1 : "";
          if (result1 !== null) {
            result0 = [result0, result1];
          } else {
            result0 = null;
            pos = pos1;
          }
        } else {
          result0 = null;
          pos = pos1;
        }
        if (result0 !== null) {
          result0 = (function(code) {
              return {
                type: "initializer",
                code: code
              };
            })(result0[0]);
        }
        if (result0 === null) {
          pos = pos0;
        }
        
        cache[cacheKey] = {
          nextPos: pos,
          result:  result0
        };
        return result0;
      }
      
      function parse_rule() {
        var cacheKey = "rule@" + pos;
        var cachedResult = cache[cacheKey];
        if (cachedResult) {
          pos = cachedResult.nextPos;
          return cachedResult.result;
        }
        
        var result0, result1, result2, result3, result4, result5;
        var pos0, pos1, pos2;
        
        pos0 = pos;
        pos1 = pos;
        result0 = parse_identifier();
        if (result0 !== null) {
          result1 = parse_string();
          if (result1 === null) {
            result1 = "";
          }
          if (result1 !== null) {
            result2 = parse_equals();
            if (result2 !== null) {
              result3 = parse_choice();
              if (result3 !== null) {
                result4 = parse_semicolon();
                result4 = result4 !== null ? result4 : "";
                if (result4 !== null) {
                  result0 = [result0, result1, result2, result3, result4];
                } else {
                  result0 = null;
                  pos = pos1;
                }
              } else {
                result0 = null;
                pos = pos1;
              }
            } else {
              result0 = null;
              pos = pos1;
            }
          } else {
            result0 = null;
            pos = pos1;
          }
        } else {
          result0 = null;
          pos = pos1;
        }
        if (result0 !== null) {
          result0 = (function(name, displayName, expression) {
              return {
                type:        "rule",
                name:        name,
                displayName: displayName !== "" ? displayName : null,
                expression:  expression
              };
            })(result0[0], result0[1], result0[3]);
        }
        if (result0 === null) {
          pos = pos0;
        }
        
        cache[cacheKey] = {
          nextPos: pos,
          result:  result0
        };
        return result0;
      }
      
      function parse_choice() {
        var cacheKey = "choice@" + pos;
        var cachedResult = cache[cacheKey];
        if (cachedResult) {
          pos = cachedResult.nextPos;
          return cachedResult.result;
        }
        
        var result0, result1, result2, result3, result4, result5;
        var pos0, pos1, pos2, pos3;
        
        pos0 = pos;
        pos1 = pos;
        result0 = parse_sequence();
        if (result0 !== null) {
          result1 = [];
          pos2 = pos;
          result2 = parse_slash();
          if (result2 !== null) {
            result3 = parse_sequence();
            if (result3 !== null) {
              result2 = [result2, result3];
            } else {
              result2 = null;
              pos = pos2;
            }
          } else {
            result2 = null;
            pos = pos2;
          }
          while (result2 !== null) {
            result1.push(result2);
            pos2 = pos;
            result2 = parse_slash();
            if (result2 !== null) {
              result3 = parse_sequence();
              if (result3 !== null) {
                result2 = [result2, result3];
              } else {
                result2 = null;
                pos = pos2;
              }
            } else {
              result2 = null;
              pos = pos2;
            }
          }
          if (result1 !== null) {
            result0 = [result0, result1];
          } else {
            result0 = null;
            pos = pos1;
          }
        } else {
          result0 = null;
          pos = pos1;
        }
        if (result0 !== null) {
          result0 = (function(head, tail) {
              if (tail.length > 0) {
                var alternatives = [head].concat(map(
                    tail,
                    function(element) { return element[1]; }
                ));
                return {
                  type:         "choice",
                  alternatives: alternatives
                };
              } else {
                return head;
              }
            })(result0[0], result0[1]);
        }
        if (result0 === null) {
          pos = pos0;
        }
        
        cache[cacheKey] = {
          nextPos: pos,
          result:  result0
        };
        return result0;
      }
      
      function parse_sequence() {
        var cacheKey = "sequence@" + pos;
        var cachedResult = cache[cacheKey];
        if (cachedResult) {
          pos = cachedResult.nextPos;
          return cachedResult.result;
        }
        
        var result0, result1, result2;
        var pos0, pos1, pos2;
        
        pos0 = pos;
        pos1 = pos;
        result0 = [];
        result1 = parse_labeled();
        while (result1 !== null) {
          result0.push(result1);
          result1 = parse_labeled();
        }
        if (result0 !== null) {
          result1 = parse_action();
          if (result1 !== null) {
            result0 = [result0, result1];
          } else {
            result0 = null;
            pos = pos1;
          }
        } else {
          result0 = null;
          pos = pos1;
        }
        if (result0 !== null) {
          result0 = (function(elements, code) {
              var expression = elements.length !== 1
                ? {
                    type:     "sequence",
                    elements: elements
                  }
                : elements[0];
              return {
                type:       "action",
                expression: expression,
                code:       code
              };
            })(result0[0], result0[1]);
        }
        if (result0 === null) {
          pos = pos0;
        }
        if (result0 === null) {
          pos0 = pos;
          result0 = [];
          result1 = parse_labeled();
          while (result1 !== null) {
            result0.push(result1);
            result1 = parse_labeled();
          }
          if (result0 !== null) {
            result0 = (function(elements) {
                return elements.length !== 1
                  ? {
                      type:     "sequence",
                      elements: elements
                    }
                  : elements[0];
              })(result0);
          }
          if (result0 === null) {
            pos = pos0;
          }
        }
        
        cache[cacheKey] = {
          nextPos: pos,
          result:  result0
        };
        return result0;
      }
      
      function parse_labeled() {
        var cacheKey = "labeled@" + pos;
        var cachedResult = cache[cacheKey];
        if (cachedResult) {
          pos = cachedResult.nextPos;
          return cachedResult.result;
        }
        
        var result0, result1, result2, result3;
        var pos0, pos1, pos2;
        
        pos0 = pos;
        pos1 = pos;
        result0 = parse_identifier();
        if (result0 !== null) {
          result1 = parse_colon();
          if (result1 !== null) {
            result2 = parse_prefixed();
            if (result2 !== null) {
              result0 = [result0, result1, result2];
            } else {
              result0 = null;
              pos = pos1;
            }
          } else {
            result0 = null;
            pos = pos1;
          }
        } else {
          result0 = null;
          pos = pos1;
        }
        if (result0 !== null) {
          result0 = (function(label, expression) {
              return {
                type:       "labeled",
                label:      label,
                expression: expression
              };
            })(result0[0], result0[2]);
        }
        if (result0 === null) {
          pos = pos0;
        }
        if (result0 === null) {
          result0 = parse_prefixed();
        }
        
        cache[cacheKey] = {
          nextPos: pos,
          result:  result0
        };
        return result0;
      }
      
      function parse_prefixed() {
        var cacheKey = "prefixed@" + pos;
        var cachedResult = cache[cacheKey];
        if (cachedResult) {
          pos = cachedResult.nextPos;
          return cachedResult.result;
        }
        
        var result0, result1, result2;
        var pos0, pos1, pos2;
        
        pos0 = pos;
        pos1 = pos;
        result0 = parse_and();
        if (result0 !== null) {
          result1 = parse_action();
          if (result1 !== null) {
            result0 = [result0, result1];
          } else {
            result0 = null;
            pos = pos1;
          }
        } else {
          result0 = null;
          pos = pos1;
        }
        if (result0 !== null) {
          result0 = (function(code) {
              return {
                type: "semantic_and",
                code: code
              };
            })(result0[1]);
        }
        if (result0 === null) {
          pos = pos0;
        }
        if (result0 === null) {
          pos0 = pos;
          pos1 = pos;
          result0 = parse_and();
          if (result0 !== null) {
            result1 = parse_suffixed();
            if (result1 !== null) {
              result0 = [result0, result1];
            } else {
              result0 = null;
              pos = pos1;
            }
          } else {
            result0 = null;
            pos = pos1;
          }
          if (result0 !== null) {
            result0 = (function(expression) {
                return {
                  type:       "simple_and",
                  expression: expression
                };
              })(result0[1]);
          }
          if (result0 === null) {
            pos = pos0;
          }
          if (result0 === null) {
            pos0 = pos;
            pos1 = pos;
            result0 = parse_not();
            if (result0 !== null) {
              result1 = parse_action();
              if (result1 !== null) {
                result0 = [result0, result1];
              } else {
                result0 = null;
                pos = pos1;
              }
            } else {
              result0 = null;
              pos = pos1;
            }
            if (result0 !== null) {
              result0 = (function(code) {
                  return {
                    type: "semantic_not",
                    code: code
                  };
                })(result0[1]);
            }
            if (result0 === null) {
              pos = pos0;
            }
            if (result0 === null) {
              pos0 = pos;
              pos1 = pos;
              result0 = parse_not();
              if (result0 !== null) {
                result1 = parse_suffixed();
                if (result1 !== null) {
                  result0 = [result0, result1];
                } else {
                  result0 = null;
                  pos = pos1;
                }
              } else {
                result0 = null;
                pos = pos1;
              }
              if (result0 !== null) {
                result0 = (function(expression) {
                    return {
                      type:       "simple_not",
                      expression: expression
                    };
                  })(result0[1]);
              }
              if (result0 === null) {
                pos = pos0;
              }
              if (result0 === null) {
                result0 = parse_suffixed();
              }
            }
          }
        }
        
        cache[cacheKey] = {
          nextPos: pos,
          result:  result0
        };
        return result0;
      }
      
      function parse_suffixed() {
        var cacheKey = "suffixed@" + pos;
        var cachedResult = cache[cacheKey];
        if (cachedResult) {
          pos = cachedResult.nextPos;
          return cachedResult.result;
        }
        
        var result0, result1, result2;
        var pos0, pos1, pos2;
        
        pos0 = pos;
        pos1 = pos;
        result0 = parse_primary();
        if (result0 !== null) {
          result1 = parse_question();
          if (result1 !== null) {
            result0 = [result0, result1];
          } else {
            result0 = null;
            pos = pos1;
          }
        } else {
          result0 = null;
          pos = pos1;
        }
        if (result0 !== null) {
          result0 = (function(expression) {
              return {
                type:       "optional",
                expression: expression
              };
            })(result0[0]);
        }
        if (result0 === null) {
          pos = pos0;
        }
        if (result0 === null) {
          pos0 = pos;
          pos1 = pos;
          result0 = parse_primary();
          if (result0 !== null) {
            result1 = parse_star();
            if (result1 !== null) {
              result0 = [result0, result1];
            } else {
              result0 = null;
              pos = pos1;
            }
          } else {
            result0 = null;
            pos = pos1;
          }
          if (result0 !== null) {
            result0 = (function(expression) {
                return {
                  type:       "zero_or_more",
                  expression: expression
                };
              })(result0[0]);
          }
          if (result0 === null) {
            pos = pos0;
          }
          if (result0 === null) {
            pos0 = pos;
            pos1 = pos;
            result0 = parse_primary();
            if (result0 !== null) {
              result1 = parse_plus();
              if (result1 !== null) {
                result0 = [result0, result1];
              } else {
                result0 = null;
                pos = pos1;
              }
            } else {
              result0 = null;
              pos = pos1;
            }
            if (result0 !== null) {
              result0 = (function(expression) {
                  return {
                    type:       "one_or_more",
                    expression: expression
                  };
                })(result0[0]);
            }
            if (result0 === null) {
              pos = pos0;
            }
            if (result0 === null) {
              result0 = parse_primary();
            }
          }
        }
        
        cache[cacheKey] = {
          nextPos: pos,
          result:  result0
        };
        return result0;
      }
      
      function parse_primary() {
        var cacheKey = "primary@" + pos;
        var cachedResult = cache[cacheKey];
        if (cachedResult) {
          pos = cachedResult.nextPos;
          return cachedResult.result;
        }
        
        var result0, result1, result2, result3, result4;
        var pos0, pos1, pos2, pos3, pos4;
        
        pos0 = pos;
        pos1 = pos;
        result0 = parse_identifier();
        if (result0 !== null) {
          pos2 = pos;
          reportFailures++;
          pos3 = pos;
          result1 = parse_string();
          if (result1 === null) {
            result1 = "";
          }
          if (result1 !== null) {
            result2 = parse_equals();
            if (result2 !== null) {
              result1 = [result1, result2];
            } else {
              result1 = null;
              pos = pos3;
            }
          } else {
            result1 = null;
            pos = pos3;
          }
          reportFailures--;
          if (result1 === null) {
            result1 = "";
          } else {
            result1 = null;
            pos = pos2;
          }
          if (result1 !== null) {
            result0 = [result0, result1];
          } else {
            result0 = null;
            pos = pos1;
          }
        } else {
          result0 = null;
          pos = pos1;
        }
        if (result0 !== null) {
          result0 = (function(name) {
              return {
                type: "rule_ref",
                name: name
              };
            })(result0[0]);
        }
        if (result0 === null) {
          pos = pos0;
        }
        if (result0 === null) {
          result0 = parse_literal();
          if (result0 === null) {
            pos0 = pos;
            result0 = parse_dot();
            if (result0 !== null) {
              result0 = (function() { return { type: "any" }; })();
            }
            if (result0 === null) {
              pos = pos0;
            }
            if (result0 === null) {
              result0 = parse_class();
              if (result0 === null) {
                pos0 = pos;
                pos1 = pos;
                result0 = parse_lparen();
                if (result0 !== null) {
                  result1 = parse_choice();
                  if (result1 !== null) {
                    result2 = parse_rparen();
                    if (result2 !== null) {
                      result0 = [result0, result1, result2];
                    } else {
                      result0 = null;
                      pos = pos1;
                    }
                  } else {
                    result0 = null;
                    pos = pos1;
                  }
                } else {
                  result0 = null;
                  pos = pos1;
                }
                if (result0 !== null) {
                  result0 = (function(expression) { return expression; })(result0[1]);
                }
                if (result0 === null) {
                  pos = pos0;
                }
              }
            }
          }
        }
        
        cache[cacheKey] = {
          nextPos: pos,
          result:  result0
        };
        return result0;
      }
      
      function parse_action() {
        var cacheKey = "action@" + pos;
        var cachedResult = cache[cacheKey];
        if (cachedResult) {
          pos = cachedResult.nextPos;
          return cachedResult.result;
        }
        
        var result0, result1, result2;
        var pos0, pos1, pos2;
        
        reportFailures++;
        pos0 = pos;
        pos1 = pos;
        result0 = parse_braced();
        if (result0 !== null) {
          result1 = parse___();
          if (result1 !== null) {
            result0 = [result0, result1];
          } else {
            result0 = null;
            pos = pos1;
          }
        } else {
          result0 = null;
          pos = pos1;
        }
        if (result0 !== null) {
          result0 = (function(braced) { return braced.substr(1, braced.length - 2); })(result0[0]);
        }
        if (result0 === null) {
          pos = pos0;
        }
        reportFailures--;
        if (reportFailures === 0 && result0 === null) {
          matchFailed("action");
        }
        
        cache[cacheKey] = {
          nextPos: pos,
          result:  result0
        };
        return result0;
      }
      
      function parse_braced() {
        var cacheKey = "braced@" + pos;
        var cachedResult = cache[cacheKey];
        if (cachedResult) {
          pos = cachedResult.nextPos;
          return cachedResult.result;
        }
        
        var result0, result1, result2, result3;
        var pos0, pos1, pos2;
        
        pos0 = pos;
        pos1 = pos;
        if (input.charCodeAt(pos) === 123) {
          result0 = "{";
          pos += 1;
        } else {
          result0 = null;
          if (reportFailures === 0) {
            matchFailed("\"{\"");
          }
        }
        if (result0 !== null) {
          result1 = [];
          result2 = parse_braced();
          if (result2 === null) {
            result2 = parse_nonBraceCharacter();
          }
          while (result2 !== null) {
            result1.push(result2);
            result2 = parse_braced();
            if (result2 === null) {
              result2 = parse_nonBraceCharacter();
            }
          }
          if (result1 !== null) {
            if (input.charCodeAt(pos) === 125) {
              result2 = "}";
              pos += 1;
            } else {
              result2 = null;
              if (reportFailures === 0) {
                matchFailed("\"}\"");
              }
            }
            if (result2 !== null) {
              result0 = [result0, result1, result2];
            } else {
              result0 = null;
              pos = pos1;
            }
          } else {
            result0 = null;
            pos = pos1;
          }
        } else {
          result0 = null;
          pos = pos1;
        }
        if (result0 !== null) {
          result0 = (function(parts) {
              return "{" + parts.join("") + "}";
            })(result0[1]);
        }
        if (result0 === null) {
          pos = pos0;
        }
        
        cache[cacheKey] = {
          nextPos: pos,
          result:  result0
        };
        return result0;
      }
      
      function parse_nonBraceCharacters() {
        var cacheKey = "nonBraceCharacters@" + pos;
        var cachedResult = cache[cacheKey];
        if (cachedResult) {
          pos = cachedResult.nextPos;
          return cachedResult.result;
        }
        
        var result0, result1;
        var pos0, pos1;
        
        pos0 = pos;
        result1 = parse_nonBraceCharacter();
        if (result1 !== null) {
          result0 = [];
          while (result1 !== null) {
            result0.push(result1);
            result1 = parse_nonBraceCharacter();
          }
        } else {
          result0 = null;
        }
        if (result0 !== null) {
          result0 = (function(chars) { return chars.join(""); })(result0);
        }
        if (result0 === null) {
          pos = pos0;
        }
        
        cache[cacheKey] = {
          nextPos: pos,
          result:  result0
        };
        return result0;
      }
      
      function parse_nonBraceCharacter() {
        var cacheKey = "nonBraceCharacter@" + pos;
        var cachedResult = cache[cacheKey];
        if (cachedResult) {
          pos = cachedResult.nextPos;
          return cachedResult.result;
        }
        
        var result0;
        var pos0;
        
        if (/^[^{}]/.test(input.charAt(pos))) {
          result0 = input.charAt(pos);
          pos++;
        } else {
          result0 = null;
          if (reportFailures === 0) {
            matchFailed("[^{}]");
          }
        }
        
        cache[cacheKey] = {
          nextPos: pos,
          result:  result0
        };
        return result0;
      }
      
      function parse_equals() {
        var cacheKey = "equals@" + pos;
        var cachedResult = cache[cacheKey];
        if (cachedResult) {
          pos = cachedResult.nextPos;
          return cachedResult.result;
        }
        
        var result0, result1, result2;
        var pos0, pos1, pos2;
        
        pos0 = pos;
        pos1 = pos;
        if (input.charCodeAt(pos) === 61) {
          result0 = "=";
          pos += 1;
        } else {
          result0 = null;
          if (reportFailures === 0) {
            matchFailed("\"=\"");
          }
        }
        if (result0 !== null) {
          result1 = parse___();
          if (result1 !== null) {
            result0 = [result0, result1];
          } else {
            result0 = null;
            pos = pos1;
          }
        } else {
          result0 = null;
          pos = pos1;
        }
        if (result0 !== null) {
          result0 = (function() { return "="; })();
        }
        if (result0 === null) {
          pos = pos0;
        }
        
        cache[cacheKey] = {
          nextPos: pos,
          result:  result0
        };
        return result0;
      }
      
      function parse_colon() {
        var cacheKey = "colon@" + pos;
        var cachedResult = cache[cacheKey];
        if (cachedResult) {
          pos = cachedResult.nextPos;
          return cachedResult.result;
        }
        
        var result0, result1, result2;
        var pos0, pos1, pos2;
        
        pos0 = pos;
        pos1 = pos;
        if (input.charCodeAt(pos) === 58) {
          result0 = ":";
          pos += 1;
        } else {
          result0 = null;
          if (reportFailures === 0) {
            matchFailed("\":\"");
          }
        }
        if (result0 !== null) {
          result1 = parse___();
          if (result1 !== null) {
            result0 = [result0, result1];
          } else {
            result0 = null;
            pos = pos1;
          }
        } else {
          result0 = null;
          pos = pos1;
        }
        if (result0 !== null) {
          result0 = (function() { return ":"; })();
        }
        if (result0 === null) {
          pos = pos0;
        }
        
        cache[cacheKey] = {
          nextPos: pos,
          result:  result0
        };
        return result0;
      }
      
      function parse_semicolon() {
        var cacheKey = "semicolon@" + pos;
        var cachedResult = cache[cacheKey];
        if (cachedResult) {
          pos = cachedResult.nextPos;
          return cachedResult.result;
        }
        
        var result0, result1, result2;
        var pos0, pos1, pos2;
        
        pos0 = pos;
        pos1 = pos;
        if (input.charCodeAt(pos) === 59) {
          result0 = ";";
          pos += 1;
        } else {
          result0 = null;
          if (reportFailures === 0) {
            matchFailed("\";\"");
          }
        }
        if (result0 !== null) {
          result1 = parse___();
          if (result1 !== null) {
            result0 = [result0, result1];
          } else {
            result0 = null;
            pos = pos1;
          }
        } else {
          result0 = null;
          pos = pos1;
        }
        if (result0 !== null) {
          result0 = (function() { return ";"; })();
        }
        if (result0 === null) {
          pos = pos0;
        }
        
        cache[cacheKey] = {
          nextPos: pos,
          result:  result0
        };
        return result0;
      }
      
      function parse_slash() {
        var cacheKey = "slash@" + pos;
        var cachedResult = cache[cacheKey];
        if (cachedResult) {
          pos = cachedResult.nextPos;
          return cachedResult.result;
        }
        
        var result0, result1, result2;
        var pos0, pos1, pos2;
        
        pos0 = pos;
        pos1 = pos;
        if (input.charCodeAt(pos) === 47) {
          result0 = "/";
          pos += 1;
        } else {
          result0 = null;
          if (reportFailures === 0) {
            matchFailed("\"/\"");
          }
        }
        if (result0 !== null) {
          result1 = parse___();
          if (result1 !== null) {
            result0 = [result0, result1];
          } else {
            result0 = null;
            pos = pos1;
          }
        } else {
          result0 = null;
          pos = pos1;
        }
        if (result0 !== null) {
          result0 = (function() { return "/"; })();
        }
        if (result0 === null) {
          pos = pos0;
        }
        
        cache[cacheKey] = {
          nextPos: pos,
          result:  result0
        };
        return result0;
      }
      
      function parse_and() {
        var cacheKey = "and@" + pos;
        var cachedResult = cache[cacheKey];
        if (cachedResult) {
          pos = cachedResult.nextPos;
          return cachedResult.result;
        }
        
        var result0, result1, result2;
        var pos0, pos1, pos2;
        
        pos0 = pos;
        pos1 = pos;
        if (input.charCodeAt(pos) === 38) {
          result0 = "&";
          pos += 1;
        } else {
          result0 = null;
          if (reportFailures === 0) {
            matchFailed("\"&\"");
          }
        }
        if (result0 !== null) {
          result1 = parse___();
          if (result1 !== null) {
            result0 = [result0, result1];
          } else {
            result0 = null;
            pos = pos1;
          }
        } else {
          result0 = null;
          pos = pos1;
        }
        if (result0 !== null) {
          result0 = (function() { return "&"; })();
        }
        if (result0 === null) {
          pos = pos0;
        }
        
        cache[cacheKey] = {
          nextPos: pos,
          result:  result0
        };
        return result0;
      }
      
      function parse_not() {
        var cacheKey = "not@" + pos;
        var cachedResult = cache[cacheKey];
        if (cachedResult) {
          pos = cachedResult.nextPos;
          return cachedResult.result;
        }
        
        var result0, result1, result2;
        var pos0, pos1, pos2;
        
        pos0 = pos;
        pos1 = pos;
        if (input.charCodeAt(pos) === 33) {
          result0 = "!";
          pos += 1;
        } else {
          result0 = null;
          if (reportFailures === 0) {
            matchFailed("\"!\"");
          }
        }
        if (result0 !== null) {
          result1 = parse___();
          if (result1 !== null) {
            result0 = [result0, result1];
          } else {
            result0 = null;
            pos = pos1;
          }
        } else {
          result0 = null;
          pos = pos1;
        }
        if (result0 !== null) {
          result0 = (function() { return "!"; })();
        }
        if (result0 === null) {
          pos = pos0;
        }
        
        cache[cacheKey] = {
          nextPos: pos,
          result:  result0
        };
        return result0;
      }
      
      function parse_question() {
        var cacheKey = "question@" + pos;
        var cachedResult = cache[cacheKey];
        if (cachedResult) {
          pos = cachedResult.nextPos;
          return cachedResult.result;
        }
        
        var result0, result1, result2;
        var pos0, pos1, pos2;
        
        pos0 = pos;
        pos1 = pos;
        if (input.charCodeAt(pos) === 63) {
          result0 = "?";
          pos += 1;
        } else {
          result0 = null;
          if (reportFailures === 0) {
            matchFailed("\"?\"");
          }
        }
        if (result0 !== null) {
          result1 = parse___();
          if (result1 !== null) {
            result0 = [result0, result1];
          } else {
            result0 = null;
            pos = pos1;
          }
        } else {
          result0 = null;
          pos = pos1;
        }
        if (result0 !== null) {
          result0 = (function() { return "?"; })();
        }
        if (result0 === null) {
          pos = pos0;
        }
        
        cache[cacheKey] = {
          nextPos: pos,
          result:  result0
        };
        return result0;
      }
      
      function parse_star() {
        var cacheKey = "star@" + pos;
        var cachedResult = cache[cacheKey];
        if (cachedResult) {
          pos = cachedResult.nextPos;
          return cachedResult.result;
        }
        
        var result0, result1, result2;
        var pos0, pos1, pos2;
        
        pos0 = pos;
        pos1 = pos;
        if (input.charCodeAt(pos) === 42) {
          result0 = "*";
          pos += 1;
        } else {
          result0 = null;
          if (reportFailures === 0) {
            matchFailed("\"*\"");
          }
        }
        if (result0 !== null) {
          result1 = parse___();
          if (result1 !== null) {
            result0 = [result0, result1];
          } else {
            result0 = null;
            pos = pos1;
          }
        } else {
          result0 = null;
          pos = pos1;
        }
        if (result0 !== null) {
          result0 = (function() { return "*"; })();
        }
        if (result0 === null) {
          pos = pos0;
        }
        
        cache[cacheKey] = {
          nextPos: pos,
          result:  result0
        };
        return result0;
      }
      
      function parse_plus() {
        var cacheKey = "plus@" + pos;
        var cachedResult = cache[cacheKey];
        if (cachedResult) {
          pos = cachedResult.nextPos;
          return cachedResult.result;
        }
        
        var result0, result1, result2;
        var pos0, pos1, pos2;
        
        pos0 = pos;
        pos1 = pos;
        if (input.charCodeAt(pos) === 43) {
          result0 = "+";
          pos += 1;
        } else {
          result0 = null;
          if (reportFailures === 0) {
            matchFailed("\"+\"");
          }
        }
        if (result0 !== null) {
          result1 = parse___();
          if (result1 !== null) {
            result0 = [result0, result1];
          } else {
            result0 = null;
            pos = pos1;
          }
        } else {
          result0 = null;
          pos = pos1;
        }
        if (result0 !== null) {
          result0 = (function() { return "+"; })();
        }
        if (result0 === null) {
          pos = pos0;
        }
        
        cache[cacheKey] = {
          nextPos: pos,
          result:  result0
        };
        return result0;
      }
      
      function parse_lparen() {
        var cacheKey = "lparen@" + pos;
        var cachedResult = cache[cacheKey];
        if (cachedResult) {
          pos = cachedResult.nextPos;
          return cachedResult.result;
        }
        
        var result0, result1, result2;
        var pos0, pos1, pos2;
        
        pos0 = pos;
        pos1 = pos;
        if (input.charCodeAt(pos) === 40) {
          result0 = "(";
          pos += 1;
        } else {
          result0 = null;
          if (reportFailures === 0) {
            matchFailed("\"(\"");
          }
        }
        if (result0 !== null) {
          result1 = parse___();
          if (result1 !== null) {
            result0 = [result0, result1];
          } else {
            result0 = null;
            pos = pos1;
          }
        } else {
          result0 = null;
          pos = pos1;
        }
        if (result0 !== null) {
          result0 = (function() { return "("; })();
        }
        if (result0 === null) {
          pos = pos0;
        }
        
        cache[cacheKey] = {
          nextPos: pos,
          result:  result0
        };
        return result0;
      }
      
      function parse_rparen() {
        var cacheKey = "rparen@" + pos;
        var cachedResult = cache[cacheKey];
        if (cachedResult) {
          pos = cachedResult.nextPos;
          return cachedResult.result;
        }
        
        var result0, result1, result2;
        var pos0, pos1, pos2;
        
        pos0 = pos;
        pos1 = pos;
        if (input.charCodeAt(pos) === 41) {
          result0 = ")";
          pos += 1;
        } else {
          result0 = null;
          if (reportFailures === 0) {
            matchFailed("\")\"");
          }
        }
        if (result0 !== null) {
          result1 = parse___();
          if (result1 !== null) {
            result0 = [result0, result1];
          } else {
            result0 = null;
            pos = pos1;
          }
        } else {
          result0 = null;
          pos = pos1;
        }
        if (result0 !== null) {
          result0 = (function() { return ")"; })();
        }
        if (result0 === null) {
          pos = pos0;
        }
        
        cache[cacheKey] = {
          nextPos: pos,
          result:  result0
        };
        return result0;
      }
      
      function parse_dot() {
        var cacheKey = "dot@" + pos;
        var cachedResult = cache[cacheKey];
        if (cachedResult) {
          pos = cachedResult.nextPos;
          return cachedResult.result;
        }
        
        var result0, result1, result2;
        var pos0, pos1, pos2;
        
        pos0 = pos;
        pos1 = pos;
        if (input.charCodeAt(pos) === 46) {
          result0 = ".";
          pos += 1;
        } else {
          result0 = null;
          if (reportFailures === 0) {
            matchFailed("\".\"");
          }
        }
        if (result0 !== null) {
          result1 = parse___();
          if (result1 !== null) {
            result0 = [result0, result1];
          } else {
            result0 = null;
            pos = pos1;
          }
        } else {
          result0 = null;
          pos = pos1;
        }
        if (result0 !== null) {
          result0 = (function() { return "."; })();
        }
        if (result0 === null) {
          pos = pos0;
        }
        
        cache[cacheKey] = {
          nextPos: pos,
          result:  result0
        };
        return result0;
      }
      
      function parse_identifier() {
        var cacheKey = "identifier@" + pos;
        var cachedResult = cache[cacheKey];
        if (cachedResult) {
          pos = cachedResult.nextPos;
          return cachedResult.result;
        }
        
        var result0, result1, result2, result3;
        var pos0, pos1, pos2;
        
        reportFailures++;
        pos0 = pos;
        pos1 = pos;
        result0 = parse_letter();
        if (result0 === null) {
          if (input.charCodeAt(pos) === 95) {
            result0 = "_";
            pos += 1;
          } else {
            result0 = null;
            if (reportFailures === 0) {
              matchFailed("\"_\"");
            }
          }
          if (result0 === null) {
            if (input.charCodeAt(pos) === 36) {
              result0 = "$";
              pos += 1;
            } else {
              result0 = null;
              if (reportFailures === 0) {
                matchFailed("\"$\"");
              }
            }
          }
        }
        if (result0 !== null) {
          result1 = [];
          result2 = parse_letter();
          if (result2 === null) {
            result2 = parse_digit();
            if (result2 === null) {
              if (input.charCodeAt(pos) === 95) {
                result2 = "_";
                pos += 1;
              } else {
                result2 = null;
                if (reportFailures === 0) {
                  matchFailed("\"_\"");
                }
              }
              if (result2 === null) {
                if (input.charCodeAt(pos) === 36) {
                  result2 = "$";
                  pos += 1;
                } else {
                  result2 = null;
                  if (reportFailures === 0) {
                    matchFailed("\"$\"");
                  }
                }
              }
            }
          }
          while (result2 !== null) {
            result1.push(result2);
            result2 = parse_letter();
            if (result2 === null) {
              result2 = parse_digit();
              if (result2 === null) {
                if (input.charCodeAt(pos) === 95) {
                  result2 = "_";
                  pos += 1;
                } else {
                  result2 = null;
                  if (reportFailures === 0) {
                    matchFailed("\"_\"");
                  }
                }
                if (result2 === null) {
                  if (input.charCodeAt(pos) === 36) {
                    result2 = "$";
                    pos += 1;
                  } else {
                    result2 = null;
                    if (reportFailures === 0) {
                      matchFailed("\"$\"");
                    }
                  }
                }
              }
            }
          }
          if (result1 !== null) {
            result2 = parse___();
            if (result2 !== null) {
              result0 = [result0, result1, result2];
            } else {
              result0 = null;
              pos = pos1;
            }
          } else {
            result0 = null;
            pos = pos1;
          }
        } else {
          result0 = null;
          pos = pos1;
        }
        if (result0 !== null) {
          result0 = (function(head, tail) {
              return head + tail.join("");
            })(result0[0], result0[1]);
        }
        if (result0 === null) {
          pos = pos0;
        }
        reportFailures--;
        if (reportFailures === 0 && result0 === null) {
          matchFailed("identifier");
        }
        
        cache[cacheKey] = {
          nextPos: pos,
          result:  result0
        };
        return result0;
      }
      
      function parse_literal() {
        var cacheKey = "literal@" + pos;
        var cachedResult = cache[cacheKey];
        if (cachedResult) {
          pos = cachedResult.nextPos;
          return cachedResult.result;
        }
        
        var result0, result1, result2, result3;
        var pos0, pos1, pos2;
        
        reportFailures++;
        pos0 = pos;
        pos1 = pos;
        result0 = parse_doubleQuotedString();
        if (result0 === null) {
          result0 = parse_singleQuotedString();
        }
        if (result0 !== null) {
          if (input.charCodeAt(pos) === 105) {
            result1 = "i";
            pos += 1;
          } else {
            result1 = null;
            if (reportFailures === 0) {
              matchFailed("\"i\"");
            }
          }
          result1 = result1 !== null ? result1 : "";
          if (result1 !== null) {
            result2 = parse___();
            if (result2 !== null) {
              result0 = [result0, result1, result2];
            } else {
              result0 = null;
              pos = pos1;
            }
          } else {
            result0 = null;
            pos = pos1;
          }
        } else {
          result0 = null;
          pos = pos1;
        }
        if (result0 !== null) {
          result0 = (function(value, flags) {
              return {
                type:       "literal",
                value:      value,
                ignoreCase: flags === "i"
              };
            })(result0[0], result0[1]);
        }
        if (result0 === null) {
          pos = pos0;
        }
        reportFailures--;
        if (reportFailures === 0 && result0 === null) {
          matchFailed("literal");
        }
        
        cache[cacheKey] = {
          nextPos: pos,
          result:  result0
        };
        return result0;
      }
      
      function parse_string() {
        var cacheKey = "string@" + pos;
        var cachedResult = cache[cacheKey];
        if (cachedResult) {
          pos = cachedResult.nextPos;
          return cachedResult.result;
        }
        
        var result0, result1, result2;
        var pos0, pos1, pos2;
        
        reportFailures++;
        pos0 = pos;
        pos1 = pos;
        result0 = parse_doubleQuotedString();
        if (result0 === null) {
          result0 = parse_singleQuotedString();
        }
        if (result0 !== null) {
          result1 = parse___();
          if (result1 !== null) {
            result0 = [result0, result1];
          } else {
            result0 = null;
            pos = pos1;
          }
        } else {
          result0 = null;
          pos = pos1;
        }
        if (result0 !== null) {
          result0 = (function(string) { return string; })(result0[0]);
        }
        if (result0 === null) {
          pos = pos0;
        }
        reportFailures--;
        if (reportFailures === 0 && result0 === null) {
          matchFailed("string");
        }
        
        cache[cacheKey] = {
          nextPos: pos,
          result:  result0
        };
        return result0;
      }
      
      function parse_doubleQuotedString() {
        var cacheKey = "doubleQuotedString@" + pos;
        var cachedResult = cache[cacheKey];
        if (cachedResult) {
          pos = cachedResult.nextPos;
          return cachedResult.result;
        }
        
        var result0, result1, result2, result3;
        var pos0, pos1, pos2;
        
        pos0 = pos;
        pos1 = pos;
        if (input.charCodeAt(pos) === 34) {
          result0 = "\"";
          pos += 1;
        } else {
          result0 = null;
          if (reportFailures === 0) {
            matchFailed("\"\\\"\"");
          }
        }
        if (result0 !== null) {
          result1 = [];
          result2 = parse_doubleQuotedCharacter();
          while (result2 !== null) {
            result1.push(result2);
            result2 = parse_doubleQuotedCharacter();
          }
          if (result1 !== null) {
            if (input.charCodeAt(pos) === 34) {
              result2 = "\"";
              pos += 1;
            } else {
              result2 = null;
              if (reportFailures === 0) {
                matchFailed("\"\\\"\"");
              }
            }
            if (result2 !== null) {
              result0 = [result0, result1, result2];
            } else {
              result0 = null;
              pos = pos1;
            }
          } else {
            result0 = null;
            pos = pos1;
          }
        } else {
          result0 = null;
          pos = pos1;
        }
        if (result0 !== null) {
          result0 = (function(chars) { return chars.join(""); })(result0[1]);
        }
        if (result0 === null) {
          pos = pos0;
        }
        
        cache[cacheKey] = {
          nextPos: pos,
          result:  result0
        };
        return result0;
      }
      
      function parse_doubleQuotedCharacter() {
        var cacheKey = "doubleQuotedCharacter@" + pos;
        var cachedResult = cache[cacheKey];
        if (cachedResult) {
          pos = cachedResult.nextPos;
          return cachedResult.result;
        }
        
        var result0;
        var pos0;
        
        result0 = parse_simpleDoubleQuotedCharacter();
        if (result0 === null) {
          result0 = parse_simpleEscapeSequence();
          if (result0 === null) {
            result0 = parse_zeroEscapeSequence();
            if (result0 === null) {
              result0 = parse_hexEscapeSequence();
              if (result0 === null) {
                result0 = parse_unicodeEscapeSequence();
                if (result0 === null) {
                  result0 = parse_eolEscapeSequence();
                }
              }
            }
          }
        }
        
        cache[cacheKey] = {
          nextPos: pos,
          result:  result0
        };
        return result0;
      }
      
      function parse_simpleDoubleQuotedCharacter() {
        var cacheKey = "simpleDoubleQuotedCharacter@" + pos;
        var cachedResult = cache[cacheKey];
        if (cachedResult) {
          pos = cachedResult.nextPos;
          return cachedResult.result;
        }
        
        var result0, result1, result2;
        var pos0, pos1, pos2, pos3;
        
        pos0 = pos;
        pos1 = pos;
        pos2 = pos;
        reportFailures++;
        if (input.charCodeAt(pos) === 34) {
          result0 = "\"";
          pos += 1;
        } else {
          result0 = null;
          if (reportFailures === 0) {
            matchFailed("\"\\\"\"");
          }
        }
        if (result0 === null) {
          if (input.charCodeAt(pos) === 92) {
            result0 = "\\";
            pos += 1;
          } else {
            result0 = null;
            if (reportFailures === 0) {
              matchFailed("\"\\\\\"");
            }
          }
          if (result0 === null) {
            result0 = parse_eolChar();
          }
        }
        reportFailures--;
        if (result0 === null) {
          result0 = "";
        } else {
          result0 = null;
          pos = pos2;
        }
        if (result0 !== null) {
          if (input.length > pos) {
            result1 = input.charAt(pos);
            pos++;
          } else {
            result1 = null;
            if (reportFailures === 0) {
              matchFailed("any character");
            }
          }
          if (result1 !== null) {
            result0 = [result0, result1];
          } else {
            result0 = null;
            pos = pos1;
          }
        } else {
          result0 = null;
          pos = pos1;
        }
        if (result0 !== null) {
          result0 = (function(char_) { return char_; })(result0[1]);
        }
        if (result0 === null) {
          pos = pos0;
        }
        
        cache[cacheKey] = {
          nextPos: pos,
          result:  result0
        };
        return result0;
      }
      
      function parse_singleQuotedString() {
        var cacheKey = "singleQuotedString@" + pos;
        var cachedResult = cache[cacheKey];
        if (cachedResult) {
          pos = cachedResult.nextPos;
          return cachedResult.result;
        }
        
        var result0, result1, result2, result3;
        var pos0, pos1, pos2;
        
        pos0 = pos;
        pos1 = pos;
        if (input.charCodeAt(pos) === 39) {
          result0 = "'";
          pos += 1;
        } else {
          result0 = null;
          if (reportFailures === 0) {
            matchFailed("\"'\"");
          }
        }
        if (result0 !== null) {
          result1 = [];
          result2 = parse_singleQuotedCharacter();
          while (result2 !== null) {
            result1.push(result2);
            result2 = parse_singleQuotedCharacter();
          }
          if (result1 !== null) {
            if (input.charCodeAt(pos) === 39) {
              result2 = "'";
              pos += 1;
            } else {
              result2 = null;
              if (reportFailures === 0) {
                matchFailed("\"'\"");
              }
            }
            if (result2 !== null) {
              result0 = [result0, result1, result2];
            } else {
              result0 = null;
              pos = pos1;
            }
          } else {
            result0 = null;
            pos = pos1;
          }
        } else {
          result0 = null;
          pos = pos1;
        }
        if (result0 !== null) {
          result0 = (function(chars) { return chars.join(""); })(result0[1]);
        }
        if (result0 === null) {
          pos = pos0;
        }
        
        cache[cacheKey] = {
          nextPos: pos,
          result:  result0
        };
        return result0;
      }
      
      function parse_singleQuotedCharacter() {
        var cacheKey = "singleQuotedCharacter@" + pos;
        var cachedResult = cache[cacheKey];
        if (cachedResult) {
          pos = cachedResult.nextPos;
          return cachedResult.result;
        }
        
        var result0;
        var pos0;
        
        result0 = parse_simpleSingleQuotedCharacter();
        if (result0 === null) {
          result0 = parse_simpleEscapeSequence();
          if (result0 === null) {
            result0 = parse_zeroEscapeSequence();
            if (result0 === null) {
              result0 = parse_hexEscapeSequence();
              if (result0 === null) {
                result0 = parse_unicodeEscapeSequence();
                if (result0 === null) {
                  result0 = parse_eolEscapeSequence();
                }
              }
            }
          }
        }
        
        cache[cacheKey] = {
          nextPos: pos,
          result:  result0
        };
        return result0;
      }
      
      function parse_simpleSingleQuotedCharacter() {
        var cacheKey = "simpleSingleQuotedCharacter@" + pos;
        var cachedResult = cache[cacheKey];
        if (cachedResult) {
          pos = cachedResult.nextPos;
          return cachedResult.result;
        }
        
        var result0, result1, result2;
        var pos0, pos1, pos2, pos3;
        
        pos0 = pos;
        pos1 = pos;
        pos2 = pos;
        reportFailures++;
        if (input.charCodeAt(pos) === 39) {
          result0 = "'";
          pos += 1;
        } else {
          result0 = null;
          if (reportFailures === 0) {
            matchFailed("\"'\"");
          }
        }
        if (result0 === null) {
          if (input.charCodeAt(pos) === 92) {
            result0 = "\\";
            pos += 1;
          } else {
            result0 = null;
            if (reportFailures === 0) {
              matchFailed("\"\\\\\"");
            }
          }
          if (result0 === null) {
            result0 = parse_eolChar();
          }
        }
        reportFailures--;
        if (result0 === null) {
          result0 = "";
        } else {
          result0 = null;
          pos = pos2;
        }
        if (result0 !== null) {
          if (input.length > pos) {
            result1 = input.charAt(pos);
            pos++;
          } else {
            result1 = null;
            if (reportFailures === 0) {
              matchFailed("any character");
            }
          }
          if (result1 !== null) {
            result0 = [result0, result1];
          } else {
            result0 = null;
            pos = pos1;
          }
        } else {
          result0 = null;
          pos = pos1;
        }
        if (result0 !== null) {
          result0 = (function(char_) { return char_; })(result0[1]);
        }
        if (result0 === null) {
          pos = pos0;
        }
        
        cache[cacheKey] = {
          nextPos: pos,
          result:  result0
        };
        return result0;
      }
      
      function parse_class() {
        var cacheKey = "class@" + pos;
        var cachedResult = cache[cacheKey];
        if (cachedResult) {
          pos = cachedResult.nextPos;
          return cachedResult.result;
        }
        
        var result0, result1, result2, result3, result4, result5;
        var pos0, pos1, pos2;
        
        reportFailures++;
        pos0 = pos;
        pos1 = pos;
        if (input.charCodeAt(pos) === 91) {
          result0 = "[";
          pos += 1;
        } else {
          result0 = null;
          if (reportFailures === 0) {
            matchFailed("\"[\"");
          }
        }
        if (result0 !== null) {
          if (input.charCodeAt(pos) === 94) {
            result1 = "^";
            pos += 1;
          } else {
            result1 = null;
            if (reportFailures === 0) {
              matchFailed("\"^\"");
            }
          }
          result1 = result1 !== null ? result1 : "";
          if (result1 !== null) {
            result2 = [];
            result3 = parse_classCharacterRange();
            if (result3 === null) {
              result3 = parse_classCharacter();
            }
            while (result3 !== null) {
              result2.push(result3);
              result3 = parse_classCharacterRange();
              if (result3 === null) {
                result3 = parse_classCharacter();
              }
            }
            if (result2 !== null) {
              if (input.charCodeAt(pos) === 93) {
                result3 = "]";
                pos += 1;
              } else {
                result3 = null;
                if (reportFailures === 0) {
                  matchFailed("\"]\"");
                }
              }
              if (result3 !== null) {
                result4 = parse___();
                if (result4 !== null) {
                  result0 = [result0, result1, result2, result3, result4];
                } else {
                  result0 = null;
                  pos = pos1;
                }
              } else {
                result0 = null;
                pos = pos1;
              }
            } else {
              result0 = null;
              pos = pos1;
            }
          } else {
            result0 = null;
            pos = pos1;
          }
        } else {
          result0 = null;
          pos = pos1;
        }
        if (result0 !== null) {
          result0 = (function(inverted, parts) {
              var partsConverted = map(parts, function(part) { return part.data; });
              var rawText = "["
                + inverted
                + map(parts, function(part) { return part.rawText; }).join("")
                + "]";
        
              return {
                type:     "class",
                inverted: inverted === "^",
                parts:    partsConverted,
                // FIXME: Get the raw text from the input directly.
                rawText:  rawText
              };
            })(result0[1], result0[2]);
        }
        if (result0 === null) {
          pos = pos0;
        }
        reportFailures--;
        if (reportFailures === 0 && result0 === null) {
          matchFailed("character class");
        }
        
        cache[cacheKey] = {
          nextPos: pos,
          result:  result0
        };
        return result0;
      }
      
      function parse_classCharacterRange() {
        var cacheKey = "classCharacterRange@" + pos;
        var cachedResult = cache[cacheKey];
        if (cachedResult) {
          pos = cachedResult.nextPos;
          return cachedResult.result;
        }
        
        var result0, result1, result2, result3;
        var pos0, pos1, pos2;
        
        pos0 = pos;
        pos1 = pos;
        result0 = parse_classCharacter();
        if (result0 !== null) {
          if (input.charCodeAt(pos) === 45) {
            result1 = "-";
            pos += 1;
          } else {
            result1 = null;
            if (reportFailures === 0) {
              matchFailed("\"-\"");
            }
          }
          if (result1 !== null) {
            result2 = parse_classCharacter();
            if (result2 !== null) {
              result0 = [result0, result1, result2];
            } else {
              result0 = null;
              pos = pos1;
            }
          } else {
            result0 = null;
            pos = pos1;
          }
        } else {
          result0 = null;
          pos = pos1;
        }
        if (result0 !== null) {
          result0 = (function(begin, end) {
              if (begin.data.charCodeAt(0) > end.data.charCodeAt(0)) {
                throw new this.SyntaxError(
                  "Invalid character range: " + begin.rawText + "-" + end.rawText + "."
                );
              }
        
              return {
                data:    [begin.data, end.data],
                // FIXME: Get the raw text from the input directly.
                rawText: begin.rawText + "-" + end.rawText
              };
            })(result0[0], result0[2]);
        }
        if (result0 === null) {
          pos = pos0;
        }
        
        cache[cacheKey] = {
          nextPos: pos,
          result:  result0
        };
        return result0;
      }
      
      function parse_classCharacter() {
        var cacheKey = "classCharacter@" + pos;
        var cachedResult = cache[cacheKey];
        if (cachedResult) {
          pos = cachedResult.nextPos;
          return cachedResult.result;
        }
        
        var result0;
        var pos0, pos1;
        
        pos0 = pos;
        result0 = parse_bracketDelimitedCharacter();
        if (result0 !== null) {
          result0 = (function(char_) {
              return {
                data:    char_,
                // FIXME: Get the raw text from the input directly.
                rawText: quoteForRegexpClass(char_)
              };
            })(result0);
        }
        if (result0 === null) {
          pos = pos0;
        }
        
        cache[cacheKey] = {
          nextPos: pos,
          result:  result0
        };
        return result0;
      }
      
      function parse_bracketDelimitedCharacter() {
        var cacheKey = "bracketDelimitedCharacter@" + pos;
        var cachedResult = cache[cacheKey];
        if (cachedResult) {
          pos = cachedResult.nextPos;
          return cachedResult.result;
        }
        
        var result0;
        var pos0;
        
        result0 = parse_simpleBracketDelimitedCharacter();
        if (result0 === null) {
          result0 = parse_simpleEscapeSequence();
          if (result0 === null) {
            result0 = parse_zeroEscapeSequence();
            if (result0 === null) {
              result0 = parse_hexEscapeSequence();
              if (result0 === null) {
                result0 = parse_unicodeEscapeSequence();
                if (result0 === null) {
                  result0 = parse_eolEscapeSequence();
                }
              }
            }
          }
        }
        
        cache[cacheKey] = {
          nextPos: pos,
          result:  result0
        };
        return result0;
      }
      
      function parse_simpleBracketDelimitedCharacter() {
        var cacheKey = "simpleBracketDelimitedCharacter@" + pos;
        var cachedResult = cache[cacheKey];
        if (cachedResult) {
          pos = cachedResult.nextPos;
          return cachedResult.result;
        }
        
        var result0, result1, result2;
        var pos0, pos1, pos2, pos3;
        
        pos0 = pos;
        pos1 = pos;
        pos2 = pos;
        reportFailures++;
        if (input.charCodeAt(pos) === 93) {
          result0 = "]";
          pos += 1;
        } else {
          result0 = null;
          if (reportFailures === 0) {
            matchFailed("\"]\"");
          }
        }
        if (result0 === null) {
          if (input.charCodeAt(pos) === 92) {
            result0 = "\\";
            pos += 1;
          } else {
            result0 = null;
            if (reportFailures === 0) {
              matchFailed("\"\\\\\"");
            }
          }
          if (result0 === null) {
            result0 = parse_eolChar();
          }
        }
        reportFailures--;
        if (result0 === null) {
          result0 = "";
        } else {
          result0 = null;
          pos = pos2;
        }
        if (result0 !== null) {
          if (input.length > pos) {
            result1 = input.charAt(pos);
            pos++;
          } else {
            result1 = null;
            if (reportFailures === 0) {
              matchFailed("any character");
            }
          }
          if (result1 !== null) {
            result0 = [result0, result1];
          } else {
            result0 = null;
            pos = pos1;
          }
        } else {
          result0 = null;
          pos = pos1;
        }
        if (result0 !== null) {
          result0 = (function(char_) { return char_; })(result0[1]);
        }
        if (result0 === null) {
          pos = pos0;
        }
        
        cache[cacheKey] = {
          nextPos: pos,
          result:  result0
        };
        return result0;
      }
      
      function parse_simpleEscapeSequence() {
        var cacheKey = "simpleEscapeSequence@" + pos;
        var cachedResult = cache[cacheKey];
        if (cachedResult) {
          pos = cachedResult.nextPos;
          return cachedResult.result;
        }
        
        var result0, result1, result2, result3;
        var pos0, pos1, pos2, pos3;
        
        pos0 = pos;
        pos1 = pos;
        if (input.charCodeAt(pos) === 92) {
          result0 = "\\";
          pos += 1;
        } else {
          result0 = null;
          if (reportFailures === 0) {
            matchFailed("\"\\\\\"");
          }
        }
        if (result0 !== null) {
          pos2 = pos;
          reportFailures++;
          result1 = parse_digit();
          if (result1 === null) {
            if (input.charCodeAt(pos) === 120) {
              result1 = "x";
              pos += 1;
            } else {
              result1 = null;
              if (reportFailures === 0) {
                matchFailed("\"x\"");
              }
            }
            if (result1 === null) {
              if (input.charCodeAt(pos) === 117) {
                result1 = "u";
                pos += 1;
              } else {
                result1 = null;
                if (reportFailures === 0) {
                  matchFailed("\"u\"");
                }
              }
              if (result1 === null) {
                result1 = parse_eolChar();
              }
            }
          }
          reportFailures--;
          if (result1 === null) {
            result1 = "";
          } else {
            result1 = null;
            pos = pos2;
          }
          if (result1 !== null) {
            if (input.length > pos) {
              result2 = input.charAt(pos);
              pos++;
            } else {
              result2 = null;
              if (reportFailures === 0) {
                matchFailed("any character");
              }
            }
            if (result2 !== null) {
              result0 = [result0, result1, result2];
            } else {
              result0 = null;
              pos = pos1;
            }
          } else {
            result0 = null;
            pos = pos1;
          }
        } else {
          result0 = null;
          pos = pos1;
        }
        if (result0 !== null) {
          result0 = (function(char_) {
              return char_
                .replace("b", "\b")
                .replace("f", "\f")
                .replace("n", "\n")
                .replace("r", "\r")
                .replace("t", "\t")
                .replace("v", "\x0B"); // IE does not recognize "\v".
            })(result0[2]);
        }
        if (result0 === null) {
          pos = pos0;
        }
        
        cache[cacheKey] = {
          nextPos: pos,
          result:  result0
        };
        return result0;
      }
      
      function parse_zeroEscapeSequence() {
        var cacheKey = "zeroEscapeSequence@" + pos;
        var cachedResult = cache[cacheKey];
        if (cachedResult) {
          pos = cachedResult.nextPos;
          return cachedResult.result;
        }
        
        var result0, result1, result2;
        var pos0, pos1, pos2, pos3;
        
        pos0 = pos;
        pos1 = pos;
        if (input.substr(pos, 2) === "\\0") {
          result0 = "\\0";
          pos += 2;
        } else {
          result0 = null;
          if (reportFailures === 0) {
            matchFailed("\"\\\\0\"");
          }
        }
        if (result0 !== null) {
          pos2 = pos;
          reportFailures++;
          result1 = parse_digit();
          reportFailures--;
          if (result1 === null) {
            result1 = "";
          } else {
            result1 = null;
            pos = pos2;
          }
          if (result1 !== null) {
            result0 = [result0, result1];
          } else {
            result0 = null;
            pos = pos1;
          }
        } else {
          result0 = null;
          pos = pos1;
        }
        if (result0 !== null) {
          result0 = (function() { return "\x00"; })();
        }
        if (result0 === null) {
          pos = pos0;
        }
        
        cache[cacheKey] = {
          nextPos: pos,
          result:  result0
        };
        return result0;
      }
      
      function parse_hexEscapeSequence() {
        var cacheKey = "hexEscapeSequence@" + pos;
        var cachedResult = cache[cacheKey];
        if (cachedResult) {
          pos = cachedResult.nextPos;
          return cachedResult.result;
        }
        
        var result0, result1, result2, result3;
        var pos0, pos1, pos2;
        
        pos0 = pos;
        pos1 = pos;
        if (input.substr(pos, 2) === "\\x") {
          result0 = "\\x";
          pos += 2;
        } else {
          result0 = null;
          if (reportFailures === 0) {
            matchFailed("\"\\\\x\"");
          }
        }
        if (result0 !== null) {
          result1 = parse_hexDigit();
          if (result1 !== null) {
            result2 = parse_hexDigit();
            if (result2 !== null) {
              result0 = [result0, result1, result2];
            } else {
              result0 = null;
              pos = pos1;
            }
          } else {
            result0 = null;
            pos = pos1;
          }
        } else {
          result0 = null;
          pos = pos1;
        }
        if (result0 !== null) {
          result0 = (function(h1, h2) {
              return String.fromCharCode(parseInt(h1 + h2, 16));
            })(result0[1], result0[2]);
        }
        if (result0 === null) {
          pos = pos0;
        }
        
        cache[cacheKey] = {
          nextPos: pos,
          result:  result0
        };
        return result0;
      }
      
      function parse_unicodeEscapeSequence() {
        var cacheKey = "unicodeEscapeSequence@" + pos;
        var cachedResult = cache[cacheKey];
        if (cachedResult) {
          pos = cachedResult.nextPos;
          return cachedResult.result;
        }
        
        var result0, result1, result2, result3, result4, result5;
        var pos0, pos1, pos2;
        
        pos0 = pos;
        pos1 = pos;
        if (input.substr(pos, 2) === "\\u") {
          result0 = "\\u";
          pos += 2;
        } else {
          result0 = null;
          if (reportFailures === 0) {
            matchFailed("\"\\\\u\"");
          }
        }
        if (result0 !== null) {
          result1 = parse_hexDigit();
          if (result1 !== null) {
            result2 = parse_hexDigit();
            if (result2 !== null) {
              result3 = parse_hexDigit();
              if (result3 !== null) {
                result4 = parse_hexDigit();
                if (result4 !== null) {
                  result0 = [result0, result1, result2, result3, result4];
                } else {
                  result0 = null;
                  pos = pos1;
                }
              } else {
                result0 = null;
                pos = pos1;
              }
            } else {
              result0 = null;
              pos = pos1;
            }
          } else {
            result0 = null;
            pos = pos1;
          }
        } else {
          result0 = null;
          pos = pos1;
        }
        if (result0 !== null) {
          result0 = (function(h1, h2, h3, h4) {
              return String.fromCharCode(parseInt(h1 + h2 + h3 + h4, 16));
            })(result0[1], result0[2], result0[3], result0[4]);
        }
        if (result0 === null) {
          pos = pos0;
        }
        
        cache[cacheKey] = {
          nextPos: pos,
          result:  result0
        };
        return result0;
      }
      
      function parse_eolEscapeSequence() {
        var cacheKey = "eolEscapeSequence@" + pos;
        var cachedResult = cache[cacheKey];
        if (cachedResult) {
          pos = cachedResult.nextPos;
          return cachedResult.result;
        }
        
        var result0, result1, result2;
        var pos0, pos1, pos2;
        
        pos0 = pos;
        pos1 = pos;
        if (input.charCodeAt(pos) === 92) {
          result0 = "\\";
          pos += 1;
        } else {
          result0 = null;
          if (reportFailures === 0) {
            matchFailed("\"\\\\\"");
          }
        }
        if (result0 !== null) {
          result1 = parse_eol();
          if (result1 !== null) {
            result0 = [result0, result1];
          } else {
            result0 = null;
            pos = pos1;
          }
        } else {
          result0 = null;
          pos = pos1;
        }
        if (result0 !== null) {
          result0 = (function(eol) { return eol; })(result0[1]);
        }
        if (result0 === null) {
          pos = pos0;
        }
        
        cache[cacheKey] = {
          nextPos: pos,
          result:  result0
        };
        return result0;
      }
      
      function parse_digit() {
        var cacheKey = "digit@" + pos;
        var cachedResult = cache[cacheKey];
        if (cachedResult) {
          pos = cachedResult.nextPos;
          return cachedResult.result;
        }
        
        var result0;
        var pos0;
        
        if (/^[0-9]/.test(input.charAt(pos))) {
          result0 = input.charAt(pos);
          pos++;
        } else {
          result0 = null;
          if (reportFailures === 0) {
            matchFailed("[0-9]");
          }
        }
        
        cache[cacheKey] = {
          nextPos: pos,
          result:  result0
        };
        return result0;
      }
      
      function parse_hexDigit() {
        var cacheKey = "hexDigit@" + pos;
        var cachedResult = cache[cacheKey];
        if (cachedResult) {
          pos = cachedResult.nextPos;
          return cachedResult.result;
        }
        
        var result0;
        var pos0;
        
        if (/^[0-9a-fA-F]/.test(input.charAt(pos))) {
          result0 = input.charAt(pos);
          pos++;
        } else {
          result0 = null;
          if (reportFailures === 0) {
            matchFailed("[0-9a-fA-F]");
          }
        }
        
        cache[cacheKey] = {
          nextPos: pos,
          result:  result0
        };
        return result0;
      }
      
      function parse_letter() {
        var cacheKey = "letter@" + pos;
        var cachedResult = cache[cacheKey];
        if (cachedResult) {
          pos = cachedResult.nextPos;
          return cachedResult.result;
        }
        
        var result0;
        var pos0;
        
        result0 = parse_lowerCaseLetter();
        if (result0 === null) {
          result0 = parse_upperCaseLetter();
        }
        
        cache[cacheKey] = {
          nextPos: pos,
          result:  result0
        };
        return result0;
      }
      
      function parse_lowerCaseLetter() {
        var cacheKey = "lowerCaseLetter@" + pos;
        var cachedResult = cache[cacheKey];
        if (cachedResult) {
          pos = cachedResult.nextPos;
          return cachedResult.result;
        }
        
        var result0;
        var pos0;
        
        if (/^[a-z]/.test(input.charAt(pos))) {
          result0 = input.charAt(pos);
          pos++;
        } else {
          result0 = null;
          if (reportFailures === 0) {
            matchFailed("[a-z]");
          }
        }
        
        cache[cacheKey] = {
          nextPos: pos,
          result:  result0
        };
        return result0;
      }
      
      function parse_upperCaseLetter() {
        var cacheKey = "upperCaseLetter@" + pos;
        var cachedResult = cache[cacheKey];
        if (cachedResult) {
          pos = cachedResult.nextPos;
          return cachedResult.result;
        }
        
        var result0;
        var pos0;
        
        if (/^[A-Z]/.test(input.charAt(pos))) {
          result0 = input.charAt(pos);
          pos++;
        } else {
          result0 = null;
          if (reportFailures === 0) {
            matchFailed("[A-Z]");
          }
        }
        
        cache[cacheKey] = {
          nextPos: pos,
          result:  result0
        };
        return result0;
      }
      
      function parse___() {
        var cacheKey = "__@" + pos;
        var cachedResult = cache[cacheKey];
        if (cachedResult) {
          pos = cachedResult.nextPos;
          return cachedResult.result;
        }
        
        var result0, result1;
        var pos0;
        
        result0 = [];
        result1 = parse_whitespace();
        if (result1 === null) {
          result1 = parse_eol();
          if (result1 === null) {
            result1 = parse_comment();
          }
        }
        while (result1 !== null) {
          result0.push(result1);
          result1 = parse_whitespace();
          if (result1 === null) {
            result1 = parse_eol();
            if (result1 === null) {
              result1 = parse_comment();
            }
          }
        }
        
        cache[cacheKey] = {
          nextPos: pos,
          result:  result0
        };
        return result0;
      }
      
      function parse_comment() {
        var cacheKey = "comment@" + pos;
        var cachedResult = cache[cacheKey];
        if (cachedResult) {
          pos = cachedResult.nextPos;
          return cachedResult.result;
        }
        
        var result0;
        var pos0;
        
        reportFailures++;
        result0 = parse_singleLineComment();
        if (result0 === null) {
          result0 = parse_multiLineComment();
        }
        reportFailures--;
        if (reportFailures === 0 && result0 === null) {
          matchFailed("comment");
        }
        
        cache[cacheKey] = {
          nextPos: pos,
          result:  result0
        };
        return result0;
      }
      
      function parse_singleLineComment() {
        var cacheKey = "singleLineComment@" + pos;
        var cachedResult = cache[cacheKey];
        if (cachedResult) {
          pos = cachedResult.nextPos;
          return cachedResult.result;
        }
        
        var result0, result1, result2, result3, result4, result5;
        var pos0, pos1, pos2, pos3;
        
        pos0 = pos;
        if (input.substr(pos, 2) === "//") {
          result0 = "//";
          pos += 2;
        } else {
          result0 = null;
          if (reportFailures === 0) {
            matchFailed("\"//\"");
          }
        }
        if (result0 !== null) {
          result1 = [];
          pos1 = pos;
          pos2 = pos;
          reportFailures++;
          result2 = parse_eolChar();
          reportFailures--;
          if (result2 === null) {
            result2 = "";
          } else {
            result2 = null;
            pos = pos2;
          }
          if (result2 !== null) {
            if (input.length > pos) {
              result3 = input.charAt(pos);
              pos++;
            } else {
              result3 = null;
              if (reportFailures === 0) {
                matchFailed("any character");
              }
            }
            if (result3 !== null) {
              result2 = [result2, result3];
            } else {
              result2 = null;
              pos = pos1;
            }
          } else {
            result2 = null;
            pos = pos1;
          }
          while (result2 !== null) {
            result1.push(result2);
            pos1 = pos;
            pos2 = pos;
            reportFailures++;
            result2 = parse_eolChar();
            reportFailures--;
            if (result2 === null) {
              result2 = "";
            } else {
              result2 = null;
              pos = pos2;
            }
            if (result2 !== null) {
              if (input.length > pos) {
                result3 = input.charAt(pos);
                pos++;
              } else {
                result3 = null;
                if (reportFailures === 0) {
                  matchFailed("any character");
                }
              }
              if (result3 !== null) {
                result2 = [result2, result3];
              } else {
                result2 = null;
                pos = pos1;
              }
            } else {
              result2 = null;
              pos = pos1;
            }
          }
          if (result1 !== null) {
            result0 = [result0, result1];
          } else {
            result0 = null;
            pos = pos0;
          }
        } else {
          result0 = null;
          pos = pos0;
        }
        
        cache[cacheKey] = {
          nextPos: pos,
          result:  result0
        };
        return result0;
      }
      
      function parse_multiLineComment() {
        var cacheKey = "multiLineComment@" + pos;
        var cachedResult = cache[cacheKey];
        if (cachedResult) {
          pos = cachedResult.nextPos;
          return cachedResult.result;
        }
        
        var result0, result1, result2, result3, result4, result5;
        var pos0, pos1, pos2, pos3;
        
        pos0 = pos;
        if (input.substr(pos, 2) === "/*") {
          result0 = "/*";
          pos += 2;
        } else {
          result0 = null;
          if (reportFailures === 0) {
            matchFailed("\"/*\"");
          }
        }
        if (result0 !== null) {
          result1 = [];
          pos1 = pos;
          pos2 = pos;
          reportFailures++;
          if (input.substr(pos, 2) === "*/") {
            result2 = "*/";
            pos += 2;
          } else {
            result2 = null;
            if (reportFailures === 0) {
              matchFailed("\"*/\"");
            }
          }
          reportFailures--;
          if (result2 === null) {
            result2 = "";
          } else {
            result2 = null;
            pos = pos2;
          }
          if (result2 !== null) {
            if (input.length > pos) {
              result3 = input.charAt(pos);
              pos++;
            } else {
              result3 = null;
              if (reportFailures === 0) {
                matchFailed("any character");
              }
            }
            if (result3 !== null) {
              result2 = [result2, result3];
            } else {
              result2 = null;
              pos = pos1;
            }
          } else {
            result2 = null;
            pos = pos1;
          }
          while (result2 !== null) {
            result1.push(result2);
            pos1 = pos;
            pos2 = pos;
            reportFailures++;
            if (input.substr(pos, 2) === "*/") {
              result2 = "*/";
              pos += 2;
            } else {
              result2 = null;
              if (reportFailures === 0) {
                matchFailed("\"*/\"");
              }
            }
            reportFailures--;
            if (result2 === null) {
              result2 = "";
            } else {
              result2 = null;
              pos = pos2;
            }
            if (result2 !== null) {
              if (input.length > pos) {
                result3 = input.charAt(pos);
                pos++;
              } else {
                result3 = null;
                if (reportFailures === 0) {
                  matchFailed("any character");
                }
              }
              if (result3 !== null) {
                result2 = [result2, result3];
              } else {
                result2 = null;
                pos = pos1;
              }
            } else {
              result2 = null;
              pos = pos1;
            }
          }
          if (result1 !== null) {
            if (input.substr(pos, 2) === "*/") {
              result2 = "*/";
              pos += 2;
            } else {
              result2 = null;
              if (reportFailures === 0) {
                matchFailed("\"*/\"");
              }
            }
            if (result2 !== null) {
              result0 = [result0, result1, result2];
            } else {
              result0 = null;
              pos = pos0;
            }
          } else {
            result0 = null;
            pos = pos0;
          }
        } else {
          result0 = null;
          pos = pos0;
        }
        
        cache[cacheKey] = {
          nextPos: pos,
          result:  result0
        };
        return result0;
      }
      
      function parse_eol() {
        var cacheKey = "eol@" + pos;
        var cachedResult = cache[cacheKey];
        if (cachedResult) {
          pos = cachedResult.nextPos;
          return cachedResult.result;
        }
        
        var result0;
        var pos0;
        
        reportFailures++;
        if (input.charCodeAt(pos) === 10) {
          result0 = "\n";
          pos += 1;
        } else {
          result0 = null;
          if (reportFailures === 0) {
            matchFailed("\"\\n\"");
          }
        }
        if (result0 === null) {
          if (input.substr(pos, 2) === "\r\n") {
            result0 = "\r\n";
            pos += 2;
          } else {
            result0 = null;
            if (reportFailures === 0) {
              matchFailed("\"\\r\\n\"");
            }
          }
          if (result0 === null) {
            if (input.charCodeAt(pos) === 13) {
              result0 = "\r";
              pos += 1;
            } else {
              result0 = null;
              if (reportFailures === 0) {
                matchFailed("\"\\r\"");
              }
            }
            if (result0 === null) {
              if (input.charCodeAt(pos) === 8232) {
                result0 = "\u2028";
                pos += 1;
              } else {
                result0 = null;
                if (reportFailures === 0) {
                  matchFailed("\"\\u2028\"");
                }
              }
              if (result0 === null) {
                if (input.charCodeAt(pos) === 8233) {
                  result0 = "\u2029";
                  pos += 1;
                } else {
                  result0 = null;
                  if (reportFailures === 0) {
                    matchFailed("\"\\u2029\"");
                  }
                }
              }
            }
          }
        }
        reportFailures--;
        if (reportFailures === 0 && result0 === null) {
          matchFailed("end of line");
        }
        
        cache[cacheKey] = {
          nextPos: pos,
          result:  result0
        };
        return result0;
      }
      
      function parse_eolChar() {
        var cacheKey = "eolChar@" + pos;
        var cachedResult = cache[cacheKey];
        if (cachedResult) {
          pos = cachedResult.nextPos;
          return cachedResult.result;
        }
        
        var result0;
        var pos0;
        
        if (/^[\n\r\u2028\u2029]/.test(input.charAt(pos))) {
          result0 = input.charAt(pos);
          pos++;
        } else {
          result0 = null;
          if (reportFailures === 0) {
            matchFailed("[\\n\\r\\u2028\\u2029]");
          }
        }
        
        cache[cacheKey] = {
          nextPos: pos,
          result:  result0
        };
        return result0;
      }
      
      function parse_whitespace() {
        var cacheKey = "whitespace@" + pos;
        var cachedResult = cache[cacheKey];
        if (cachedResult) {
          pos = cachedResult.nextPos;
          return cachedResult.result;
        }
        
        var result0;
        var pos0;
        
        reportFailures++;
        if (/^[ \t\x0B\f\xA0\uFEFF\u1680\u180E\u2000-\u200A\u202F\u205F\u3000]/.test(input.charAt(pos))) {
          result0 = input.charAt(pos);
          pos++;
        } else {
          result0 = null;
          if (reportFailures === 0) {
            matchFailed("[ \\t\\x0B\\f\\xA0\\uFEFF\\u1680\\u180E\\u2000-\\u200A\\u202F\\u205F\\u3000]");
          }
        }
        reportFailures--;
        if (reportFailures === 0 && result0 === null) {
          matchFailed("whitespace");
        }
        
        cache[cacheKey] = {
          nextPos: pos,
          result:  result0
        };
        return result0;
      }
      
      function buildErrorMessage() {
        function buildExpected(failuresExpected) {
          failuresExpected.sort();
          
          var lastFailure = null;
          var failuresExpectedUnique = [];
          for (var i = 0; i < failuresExpected.length; i++) {
            if (failuresExpected[i] !== lastFailure) {
              failuresExpectedUnique.push(failuresExpected[i]);
              lastFailure = failuresExpected[i];
            }
          }
          
          switch (failuresExpectedUnique.length) {
            case 0:
              return "end of input";
            case 1:
              return failuresExpectedUnique[0];
            default:
              return failuresExpectedUnique.slice(0, failuresExpectedUnique.length - 1).join(", ")
                + " or "
                + failuresExpectedUnique[failuresExpectedUnique.length - 1];
          }
        }
        
        var expected = buildExpected(rightmostFailuresExpected);
        var actualPos = Math.max(pos, rightmostFailuresPos);
        var actual = actualPos < input.length
          ? quote(input.charAt(actualPos))
          : "end of input";
        
        return "Expected " + expected + " but " + actual + " found.";
      }
      
      function computeErrorPosition() {
        /*
         * The first idea was to use |String.split| to break the input up to the
         * error position along newlines and derive the line and column from
         * there. However IE's |split| implementation is so broken that it was
         * enough to prevent it.
         */
        
        var line = 1;
        var column = 1;
        var seenCR = false;
        
        for (var i = 0; i <  rightmostFailuresPos; i++) {
          var ch = input.charAt(i);
          if (ch === "\n") {
            if (!seenCR) { line++; }
            column = 1;
            seenCR = false;
          } else if (ch === "\r" || ch === "\u2028" || ch === "\u2029") {
            line++;
            column = 1;
            seenCR = true;
          } else {
            column++;
            seenCR = false;
          }
        }
        
        return { line: line, column: column };
      }
      
      
      var result = parseFunctions[startRule]();
      
      /*
       * The parser is now in one of the following three states:
       *
       * 1. The parser successfully parsed the whole input.
       *
       *    - |result !== null|
       *    - |pos === input.length|
       *    - |rightmostFailuresExpected| may or may not contain something
       *
       * 2. The parser successfully parsed only a part of the input.
       *
       *    - |result !== null|
       *    - |pos < input.length|
       *    - |rightmostFailuresExpected| may or may not contain something
       *
       * 3. The parser did not successfully parse any part of the input.
       *
       *   - |result === null|
       *   - |pos === 0|
       *   - |rightmostFailuresExpected| contains at least one failure
       *
       * All code following this comment (including called functions) must
       * handle these states.
       */
      if (result === null || pos !== input.length) {
        var errorPosition = computeErrorPosition();
        throw new this.SyntaxError(
          buildErrorMessage(),
          errorPosition.line,
          errorPosition.column
        );
      }
      
      return result;
    },
    
    /* Returns the parser source code. */
    toSource: function() { return this._source; }
  };
  
  /* Thrown when a parser encounters a syntax error. */
  
  result.SyntaxError = function(message, line, column) {
    this.name = "SyntaxError";
    this.message = message;
    this.line = line;
    this.column = column;
  };
  
  result.SyntaxError.prototype = Error.prototype;
  
  return result;
})();